COPING WITH THE UNEXPECTED: GREAT BRITAIN AND THE WAR IN THE SOUTH ATLANTIC by Christopher J. Bowie | April 1985
http://www.dtic.mil/cgi-bin/GetTRDoc...f&AD=ADA158354 [PDF 1.5Mb]
"...Heavy radar-directed gunfire led to a quick electronic countermeasure (ECM) "fix" on both RN and RAF Harriers. Resource constraints had prevented the British from providing these aircraft with a chaff dispensing system; to reduce their vulnerability during combat in the South Atlantic, the Harriers carried chaff bundles in speed brake wells and jammed between munitions and pylons for release over engagement zones. By May 20, the Harriers had been fitted with an internal chaff/flare dispenser unit...." page 7